package servlet;

import pojo.User;
import service.UserService;
import service.impl.UserServiceImpl;
import utils.Page;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

//注解
@WebServlet(urlPatterns = "/user")
public class UserServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req, resp);
    }


    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //TODO
        UserService userService = new UserServiceImpl();
        req.setCharacterEncoding("utf-8");
        String action = req.getParameter("action");
        //判断action区分操作
        if ("list".equals(action)){
            String name = req.getParameter("name");
            String pass = req.getParameter("pass");

            User condition = new User(name,pass);
            //接受当前页参数 没传是null
            String currentPage = req.getParameter("currentPage");
            if (currentPage==null){
                currentPage="1";
            }
            int int_currentPage = Integer.parseInt(currentPage);
            //创建分页对象
            Page page = new Page();
            page.setCurrentPage(int_currentPage);
            //查询用户表的记录总数
            int count = userService.count(condition);
            page.setTotalCount(count);
            page.setTotalPage();

            //计算偏移量
            int pageSize = page.getPageSize();
            int offset = (int_currentPage-1)*page.getPageSize();


            List<User> users = userService.findAll(condition,offset,pageSize);
            //把数据放到请求域
            req.setAttribute("users", users);
            req.setAttribute("condition",condition);
            req.setAttribute("page",page);

            req.getRequestDispatcher("/list.jsp").forward(req, resp);
        } else if ("delete".equals(action)) {
            //获取参数
            String sid = req.getParameter("id");
            int id = Integer.parseInt(sid);
            int result = userService.deleteUserById(id);
            if (result>0){
                resp.sendRedirect("user?action=list");
            }else {

            }
        }else if ("add".equals(action)) {
            String name = req.getParameter("name");
            String pass = req.getParameter("pass");
            int result = userService.addUser(new User(name,pass));
            if (result>0){
                resp.sendRedirect("user?action=list");
            }else {

            }
        }
        else if ("toupdate".equals(action)) {
            String sid= req.getParameter("id");
            int id = Integer.parseInt(sid);

            User users = userService.findUserById(id);


            //把数据放到请求域
            req.setAttribute("user", users);
            req.getRequestDispatcher("/updateUser.jsp").forward(req, resp);
        }else if ("update".equals(action)) {
            String sid = req.getParameter("id");
            int id = Integer.parseInt(sid);

            String name = req.getParameter("name");
            String pass = req.getParameter("pass");

            int result = userService.updateUser(new User(id,name,pass));
            if (result>0){
                resp.sendRedirect("user?action=list");
            }else {

            }
        }

    }
}
